Don't forget the ceiling for damping/diffusion
The 2 innermost 12au7's as you have found out, are the money slot.
If you decide on PL, check out Upscales page on different 12au7's. There are user reviews particularly with PL owners experiences.
I use the Brimars in my PL HP.
The 2 innermost 12au7's as you have found out, are the money slot.
If you decide on PL, check out Upscales page on different 12au7's. There are user reviews particularly with PL owners experiences.
I use the Brimars in my PL HP.